Pure Lights are invisible light sources that have no hit box.
USAGE
They can be placed like any other block and will go invisible when not held.
Hold and right click on another Pure Light to change its light level.
Pure Light can only be broken while holding another.
OBTAINING
Pure Light can be crafted by pushing a block of glass against a purpur block with glowing ink and glowstone dust in the middle.
Technical
Internally, Pure Light is just a Light Block with some extra features to make it survival friendly.
The crafting process will consume the glowing ink, glowstone dust and the glass.
Crafting cannot be done through a slime structure.